Is this ‘UFO video’ proof that aliens are flying over London?

Could this YouTube video be definitive proof that little green men exist?

At first you’d be mistaken for thinking the mysterious UFO in this video is a sun spot, but then the camera pans down and you see several people all looking up – and suddenly the lofty object abruptly changes direction.

Shared on YouTube by ‘Amazing Mystery Videos’, the clip has attracted a raft of comments, with Cris L stating: ‘I believe!’

This is not the first sighting over London to raise eyebrows recently: another UFO was spotted yesterday, prompting speculation of an alien invasion…

A member of the public posted this strange sighting on Facebook (Picture: Mixtris UFO-images)